Variantly: "You may not light a fire in all of your dwellings": From (Leviticus 6:6) "A perpetual fire shall burn on the altar," I might think, both on the weekdays and on the Sabbath. And how would I understand (Exodus 31:14) "Those who profane it shall be put to death"? As referring to other labors, other than that of (lighting) the woodpile. (But perhaps, even the woodpile.) And how would I understand (Leviticus 6:4) "It (the woodpile fire) shall not go out"? As referring to weekdays, and not the Sabbath. It is, therefore, written "You may not light a fire in all of your dwellings." For your dwellings you do not light it, but you do light it for the Temple (woodpile).